telegraf/testutil/testutil.go

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package testutil
import (
"net"
"net/url"
"os"
)
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var localhost = "localhost"
// GetLocalHost returns the DOCKER_HOST environment variable, parsing
// out any scheme or ports so that only the IP address is returned.
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func GetLocalHost() string {
if dockerHostVar := os.Getenv("DOCKER_HOST"); dockerHostVar != "" {
u, err := url.Parse(dockerHostVar)
if err != nil {
return dockerHostVar
}
// split out the ip addr from the port
host, _, err := net.SplitHostPort(u.Host)
if err != nil {
return dockerHostVar
}
return host
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}
return localhost
}